Short answers, pulled from the story.
Jazz originated in New Orleans, Louisiana, where Cajuns and Black Creoles combined French-Canadian culture with their own musical styles in the 19th century. Large Creole bands that played for funerals and parades formed a foundational basis for early jazz. Louis Armstrong and pianist Earl Hines were among the key early figures who shaped and popularized the genre.
The roots of commercial country music are generally traced to 1927, when music talent scout Ralph Peer recorded Jimmie Rodgers and The Carter Family. The genre evolved from rural Southern folk music with primarily Irish and British origins, blended with African and continental European elements.
Music scholar John Warthen Struble identified the ballads of the Civil War as the first American folk music with features distinct from any regional style derived from another country. Soldiers from across the United States were brought together in army units and rapidly traded tunes, instruments, and techniques, creating a genuinely national musical exchange for the first time.
Berry Gordy founded Motown Records in 1959 in Detroit, Michigan, with the explicit goal of transcending the R&B market and creating crossover music for mainstream audiences. Music journalist Jerry Wexler described its achievement as taking black music and beaming it directly to the white American teenager. Notable Motown acts include the Four Tops, the Temptations, the Supremes, Stevie Wonder, and the Jackson 5.
MC Sha-Rock is considered the historian and pioneer of female hip-hop culture. She started her career as a break-dancer in the Bronx, New York, and became hip-hop culture's first female emcee. She was a former member of the Funky 4+1 More and engaged in MC rhyming battles with groups such as Grandmaster Flash and the Furious 5.
When Graduation and 50 Cent's Curtis were released simultaneously in the late 2000s, West outsold 50 Cent, selling nearly a million copies of Graduation in the first week alone. Industry observers credited West's victory with proving that hip-hop did not have to conform to gangsta rap conventions to be commercially successful, opening the mainstream to artists like Drake, Kendrick Lamar, and J. Cole.